Resin foam
Abstract
The present invention relates to a resin foam including a foam layer and a surface layer, in which the foam layer has a same composition as the surface layer, and the surface layer has a surface coating ratio defined by the following formula (1) of 40% or more: Surface Coating Ratio ( % ) = [ ( Area of surface ) - ( Area of pores existing in surface ) ] ( Area of surface ) × 100 ( 1 )
Claims
exact text as granted — not AI-modified1 . A resin foam comprising a foam layer and a surface layer,
wherein the foam layer has a same composition as the surface layer, and the surface layer has a surface coating ratio defined by the following formula (1) of 40% or more:
Surface
Coating
Ratio
(
%
)
=
[
(
Area
of
surface
)
-
(
Area
of
pores
existing
in
surface
)
]
(
Area
of
surface
)
×
100
(
1
)
2 . The resin foam according to claim 1 , wherein the foam layer has an apparent density of 0.20 g/cm 3 or less.
3 . The resin foam according to claim 1 , wherein a resin constituting the resin foam is a thermoplastic resin.
4 . The resin foam according to claim 3 , wherein the thermoplastic resin is a polyolefin resin.
5 . The resin foam according to claim 1 , wherein the surface layer is formed through a hot melt treatment.
6 . The resin foam according to claim 5 , wherein a temperature for the hot melt treatment is not lower than a temperature defined by [(a softening point or a melting point of the resin constituting the resin foam)−15° C.].
7 . The resin foam according to claim 3 , being produced through a process of impregnating a resin composition including the resin with a high-pressure gas, followed by reducing the pressure.
8 . The resin foam according to claim 7 , wherein the gas is an inert gas.
9 . The resin foam according to claim 8 , wherein the inert gas is carbon dioxide.
10 . The resin foam according to claim 7 , wherein the high-pressure gas is in a supercritical state.
11 . The resin foam according to claim 1 , having a closed cell structure or a semi-interconnected semi-closed cell structure.
12 . The resin foam according to claim 1 , wherein a surface of the surface layer has a lightness L* of 33.0 or less.
13 . A foamed member comprising the resin foam according to claim 1 .
14 . The foamed member according to claim 13 , having the surface layer on one side of the foam layer and having a pressure-sensitive adhesive layer on the other side thereof.
15 . The foamed member according to claim 14 , wherein the pressure-sensitive adhesive layer is an acrylic pressure-sensitive adhesive layer.
16 . The foamed member according to claim 13 , being used in electric/electronic devices.
17 . A foamed member laminate having a constitution where the resin foam according to claim 1 is supported on a carrier tape having a substrate and a pressure-sensitive adhesive layer on at least one surface of the substrate, wherein the resin foam is stuck to the carrier tape in a form of contacting the surface layer with the pressure-sensitive adhesive layer of the carrier tape.
18 . An, electric/electronic device comprising the foamed member for electric/electronic devices according to claim 16 .Join the waitlist — get patent alerts
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